Unified Interior Regions

Hawaii

The Pacific Region has nine USGS Science Centers in California, Nevada, and Hawaii. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

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Pu‘u ‘Ō‘ō and Episode 61 flow field: December 2, 2011...
December 2, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Kīlauea East Rift Zone Eruption Map: December 2, 2011...
December 2, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Kīlauea East Rift Zone Eruption Map: November 21, 2011...
November 21, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Pu‘u ‘Ō‘ō and Episode 61 flow field: November 21, 2011...
November 21, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Kīlauea East Rift Zone Eruption Map: November 10, 2011...
November 10, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Pu‘u ‘Ō‘ō and Episode 61 flow field: November 10, 2011...
November 10, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Pu‘u ‘Ō‘ō and Episode 61 flow field: November 3, 2011...
November 3, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Kīlauea East Rift Zone Eruption Map: November 3, 2011...
November 3, 2011

Lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Kīlauea East Rift Zone Eruption Map: October 25, 2011...
October 25, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Pu‘u ‘Ō‘ō: October 25, 2011...
October 25, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Pu‘u ‘Ō‘ō...
September 22, 2011

Map showing the current configuration of Pu‘u ‘Ō‘ō.

Kīlauea East Rift Zone Eruption Map...
September 22, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption.

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August 9, 2018

Lava Entering Ocean Near Isaac Hale Beach Park

Lava continues to enter the ocean near the Isaac Hale Beach Park on Kīlauea Volcano's lower East Rift Zone. Although lava output from fissure 8 remains low, the ocean entry was still active during HVO's helicopter overflight on August 9, 2018. Numerous small streams of lava were oozing into the ocean near Ahalanui, creating weak plumes of laze. The southern flow margin

Color photograph of volcanic vent
August 7, 2018

 Aerial view of the fissure 8 cone

Aerial view of the fissure 8 cone and spillway captured by Civil Air Patrol during their overflight on August 7, 2018. View is toward the south.

New outcrops make good geology
August 6, 2018

New outcrops make good geology

This aerial view of the western part of Kīlauea Volcano's caldera was taken on August 6, 2018. The down-dropped block is faulted about 120 m (400 feet) below the caldera floor. Many 19th-century lava flows are exposed in the fault scarps. Halema‘uma‘u (not visible) is to the left of this photo.

August 6, 2018

Overflight of Kīlauea Summit

Between mid-May and early August, 2018, the depth of Halema‘uma‘u more than tripled and its diameter more than doubled as magma from Kīlauea's shallow summit reservoir moved into the lower East Rift Zone. Evidence of subsidence is visible in this video, taken during an early morning helicopter overflight on August 6, 2018. Cracks and down-dropped blocks of the caldera 

August 6, 2018

Lava Fountaining at Fissure 8

During this morning's overflight, HVO geologists observed low levels of lava fountaining within the fissure 8 spatter cone and crusted lava in the spillway and channel downstream. The significance of this change is not yet clear. Eruptions can wax and wane or pause for days to weeks before returning to high levels of lava discharge. New outbreaks in the area of the active 

Hot, molten lava flows slowly into the ocean, and the temperature difference between lava and water is creating steam.
August 5, 2018

Viscous lava hits ocean water

A viscous pāhoehoe flow from Kilauea Volcano, Hawaiʻi , entering the ocean near Isaac Hale Beach Park on the morning of August 5, 2018.

August 3, 2018

Pāhoehoe Breakout

This lava, erupted from fissure 8 on Kīlauea Volcano's lower East Rift Zone, shows classic pāhoehoe behavior. Exposed to the air, the surface of the flow chills to form a thin crust that can be stretched or broken apart, forming pieces of crust that are "subducted" back into the molten interior. The main sound is wind noise, but crackles can also be heard as flakes of

color photograph of volcanic lava channel
August 3, 2018

Lava in the fissure 8 channel spillway

Lava in the fissure 8 channel spillway was fairly low this morning, with the lava in the channel moving at a

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Color photograph of caldera
August 3, 2018

Halema‘uma‘u, taken from the northeastern caldera rim

Early morning photo of Halema‘uma‘u, taken from the northeastern caldera rim. Inward slumping of the crater rim and walls continues. Ash deposits from previous explosions and collapse events

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Assessing the Functional Equivalency of Hawaiian fishponds
July 29, 2018

Assessing the Functional Equivalency of Hawaiian fishponds

Hawaiian fishponds were important cultural and economic resources for native Hawaiians as they were an important component of a sophisticated, integrated food production system. However, changing demographics and systems of land ownership resulted in a decline in the use and upkeep of Hawaiian fishponds throughout the 19th century. The cultural value of Hawaiian fishponds

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fissures were characterized by low eruption rates
July 29, 2018

fissures were characterized by low eruption rates

During the first two weeks of Kīlauea Volcano's 2018 lower East Rift Zone eruption, fissures were characterized by low eruption rates and small flows. This was because the erupted lava originated from pockets of cooler, less fluid magma stored in the rift zone. Later fissures erupted hotter, more fluid magma, resulting in higher eruption rates and large, fast-moving lava

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Color photograph of volcano summit
July 28, 2018

Kīlauea summit caldera 

This view across the summit caldera shows ground cracks (center) just north of Halema‘uma‘u. Rockfalls within the crater and along the caldera walls continue to stir up dust that can be seen here rising above the caldera rim.

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New camera shows snowfall on summit...
December 3, 2017

A new HVO webcam provides improved views of Mauna Loa's summit caldera, Moku‘āweoweo, from the northwest rim. 

Did aerial bombing stop the 1935 Mauna Loa lava flow?...
November 30, 2017

A widely-held belief is that Thomas Jaggar, founder of the Hawaiian Volcano Observatory, was able to stop a Mauna Loa lava flow in 1935. But is it true?

CT scans and photographs of coral collected from reef near polluted groundwater seeps. One set shows more erosion than the other
November 27, 2017

Coral reefs already stressed by ocean acidification are particularly vulnerable to polluted groundwater, according to a recent study by USGS geologist Nancy Prouty and colleagues.

What do we call new land at Kīlauea Volcano's ocean entries?...
November 23, 2017

If you follow Kīlauea Volcano's ongoing East Rift Zone eruption, you are likely aware that when lava enters the ocean, it often forms new land. But what is this new land called?

Trained scent-detection dog and dog trainer at work in a taro field at Hanalei National Wildlife Refuge
November 22, 2017

Dogs have great olfactory abilities and wildlife biologists think they can help endangered waterbirds in Hawai‘i. Dogs are being trained to sniff out the endangered ducks (koloa maoli (Anas wyvilliana) and Laysan ducks (A. laysanensis)) that die of avian botulism. 

USGS
November 22, 2017

Changes at Pu‘u ‘Ō‘ō and views of the 61g flow

The surface crust on the summit lava lake has many different textur...
November 20, 2017

Typical lava lake activity at Kīlauea Volcano's summit

Drive along Saddle Road reveals outstanding volcanic geology...
November 16, 2017

Route 200, the Daniel K. Inouye Highway, crosses Humu‘ula Saddle, which separates Mauna Kea and Mauna Loa, the two largest volcanoes on the Island of Hawai‘i. This Saddle showcases outstanding volcanic geology and is easy to reach for "roadside geologists." 

Mauna Loa lava flows...
November 15, 2017

Lava flows, Pu‘u Pohaku‘ohanalei cone, Moku‘āweoweo's North Pit, Sulphur Cone area, and a video of Mauna Loa's summit caldera.